1
®
FN7409.2
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 |Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2002-2004. All Rights Reserved. Elantec is a registered trademark of Elantec Semiconductor, Inc.
All other trademarks mentioned are the property of their respective owners.
EL6935B
Laser Diode Driver w/ Waveform Generator
The EL6935B is a highly integrated laser diode driver
designed to support multi-standard writable optical drives. It
accomplishes this by incorporating a waveform generator
wherein the diode currents and timing details can be
programmed before operation. The generator inspects the
NRZ serial data waveform and generates programmed
waveforms in recognition of 3, 4, 5, or 6 or more clock
periods of space changing to 3, 4, 5, or 6 or more clock
periods of mark, and vice versa. The part also has an IV
amplifier with concurrent read and write sampling. The gains
of the IV amplifier are programmable, eliminating the need
for external potentiometers.
The flexible architecture supports different media and
speeds for Blue, DVD, and CD standards. The programming
is accomplished through a serial interface port. The clock
and NRZ inputs can be either standard CMOS or LVDS,
selectable through a program bit.
The EL6935B operates on a 5V supply for the analog circuits
and a 2.5V supply for the digital circuits.
Features
• Completely programmable laser diode driver
• 500mA maximum total output
• 10-bit x 10-bit multiplying DAC output provides 10-bit full
scale adjustment and 10-bit resolution at any full scale
output
• 55psec timer resolution
• Two laser outputs allows read/ write DVD and CD
combinations
• Programmable waveform values support CD-R, CD-RW,
DVD-RAM, DVD-R, DVD-RW, DVD+R, DVD+RW, and
Blue
• Two analog inputs support slope and read APC
• HFM oscillator programmable to 100mAP-P from 100MHz
to 500MHz
• PLL allows reduced-frequency clock on flex cable
• Separate serial input works up to 100MHz
• Dual sampled IV amplifier with programmable sample and
gain selects
• Programmable DC output when HFM is off
• Pb-free available
Applications
• Combination DVD writable and CD writable drives
• DVD camcorders
• DVD video recorders
Ordering Information
PART NUMBER PACKAGE
TAPE &
REEL PKG. DWG. #
EL6935BCL 38-Pin QFN - MDP0046
EL6935BCL-T7 38-Pin QFN 7” MDP0046
EL6935BCL-T13 38-Pin QFN 13” MDP0046
EL6935BCLZ
(Note)
38-Pin QFN
(Pb-Free)
- MDP0046
EL6935BCLZ-T7
(Note)
38-Pin QFN
(Pb-Free)
7” MDP0046
EL6935BCLZ-T13
(Note)
38-Pin QFN
(Pb-Free)
13” MDP0046
NOTE: Intersil Pb-free products employ special Pb-free material
sets; molding compounds/die attach materials and 100% matte tin
plate termination finish, which is compatible with both SnPb and
Pb-free soldering operations. Intersil Pb-free products are MSL
classified at Pb-free peak reflow temperatures that meet or exceed
the Pb-free requirements of IPC/JEDEC J Std-020B.
Data Sheet October 4, 2004
Get FULL DATASHEET
2
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems.
Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without
notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
EL6935B
